(19)

(11)

EP 2 661 690 A2

(12)

(88) Date of publication A3: 22.11.2012 (43) Date of publication: 13.11.2013 Bulletin 2013/46 (21) Application number: 11807817.9 (22) Date of filing: 19.12.2011

(51) International Patent Classification (IPC):  G06F 9/50(2006.01) (86) International application number: PCT/US2011/065755 (87) International publication number: WO 2012/094138 (12.07.2012 Gazette 2012/28)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 05.01.2011 US 984938 (71) Applicant: Alcatel Lucent 75007 Paris (FR)	(72) Inventors: LI, Li Edison NJ 08820 (US) WOO, Thomas Shorthills NJ 07078 (US) (74) Representative: Hervouet, Sylvie et al Ipsilon Feray Lenne Conseil Le Centralis 63 avenue du General Leclerc 92340 Bourg-la-Reine 92340 Bourg-la-Reine (FR)